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Savvy listeners can learn a lot about rappers just by studying their vocal delivery. In the case of Aíd, whose well-metered flows unfurl in lisp-tinged Castilian and Galician, it’s clear this Spanish female emcee is the real deal — not the result of a get-rich-quick marketing scheme. On swinging “Boogie Vigo,” the former graffiti writer rides a funk-tinged, minimal beat and lets you know all about her boundless passion. If you like the track, check out the album.